Milan Marinkovic

Senior Full Stack Engineer at Storyblok

Developed a global financial web platform using React, Next.js, and Node.js, optimizing dashboards with SSR/SSG; created modular React components with TypeScript and Redux; built real-time dashboards with WebSockets and Redis Pub/Sub, handling 500K+ concurrent updates with sub-200ms latency; optimized Next.js rendering (ISR/edge) to improve performance; implemented secure authentication via NextAuth.js and JWT; automated deployments with Docker, Kubernetes, and GitHub Actions; established monitoring with Grafana, Sentry, Datadog; mentored a team of 6 engineers.

Senior React / Node.js Developer at Infosys

Engineered enterprise SaaS solutions with React, Node.js, and Next.js; built multi-tenant architecture for 50+ enterprise clients with RBAC via JWT/OAuth2.0; optimized API integrations using GraphQL and REST; designed PWAs with improved mobile offline UX; automated deployments with Docker/Kubernetes delivering zero-downtime updates; enhanced reporting with real-time Node.js pipelines processing 2M+ daily events with sub-second response times; implemented live WebSocket features for chat/notifications; partnered with designers to refine UX/UI, boosting retention and satisfaction.

React JavaScript Developer at TransferMate

Developed healthcare and finance platforms with React, JavaScript, and Node.js serving 100K+ daily users; built secure features like digital prescriptions, online payments, and appointment scheduling; implemented modular frontend architecture with reusable hooks/context; optimized database interactions (MongoDB, PostgreSQL); improved performance with Next.js SSG/SSR; automated regression tests with Jest and Cypress achieving 80% test coverage; implemented JWT-based authentication; contributed to Agile ceremonies and ensured high on-time delivery.

Senior Full Stack Engineer at Storyblok

Led development of a global financial web platform using React, Next.js, and Node.js with SSR/SSG. Implemented modular TypeScript components and Redux for improved reusability. Architected real-time dashboards with WebSockets and Redis Pub/Sub, handling 500k+ concurrent updates with sub-200ms latency. Optimized rendering with ISR and edge functions on Vercel, boosting performance and Lighthouse scores. Integrated secure authentication/authorization with NextAuth.js and JWT for seamless SSO across partner apps. Automated deployments via Docker, Kubernetes, and GitHub Actions, reducing release cycles and maintaining high uptime. Established monitoring with Grafana, Sentry, and Datadog, lowering MTTR. Mentored a team of 6 engineers, accelerating onboarding and elevating code quality.

Senior React / Node.js Developer at Infosys

Built enterprise-grade SaaS solutions with React, Node.js, and Next.js. Delivered multi-tenant architectures for 50+ enterprise clients with RBAC via JWT/OAuth2.0. Optimized API integrations (GraphQL/REST) to reduce data fetch times and improve cross-device rendering. Developed Progressive Web Apps (PWAs) to boost mobile adoption and offline usability. Automated deployments with Docker/Kubernetes and achieved zero-downtime updates. Enhanced real-time data pipelines for anomaly detection and added live chat/notifications using WebSockets and Redis. Collaborated with designers to refine UX/UI, improving customer retention and satisfaction.

React JavaScript Developer at TransferMate

Developed healthcare and finance platforms using React, JavaScript (ES6+), and Node.js, driving adoption to 100K+ daily users. Implemented secure features like digital prescriptions and online payments with HIPAA/GDPR compliance. Built modular front-end architecture with reusable hooks and context, improving maintainability and reducing feature delivery time. Optimized database interactions (MongoDB, PostgreSQL) and Next.js SSG/SSR for faster performance. Automated regression testing with Jest and Cypress (80% test coverage). Ensured secure login/session management with JWT and contributed to Agile ceremonies to improve on-time delivery.

Senior Full Stack Engineer at Storyblok

Led the development of a global financial web platform using React, Next.js, and Node.js, focusing on SSR/SSG for fast, SEO-friendly dashboards. Built modular, TypeScript-based components with Redux for scalable state mgmt, boosting reusability by 40% and reducing production defects by 28%. Architected real-time dashboards using WebSockets and Redis Pub/Sub, supporting 500K+ concurrent updates with sub-200ms latency. Optimized rendering with ISR and edge functions on Vercel, delivering 36% faster pages and improved Lighthouse scores. Implemented secure auth flows with NextAuth.js and JWT for seamless SSO across partner apps. Automated deployment pipelines with Docker, Kubernetes, and GitHub Actions, cutting release cycles from 4 weeks to 1 and achieving 99% uptime. Established monitoring dashboards with Grafana, Sentry, and Datadog to accelerate incident response by 38% and improve customer satisfaction by 20%. Mentored a team of 6 engineers, introduced code reviews, and improved onboa

Senior React / Node.js Developer at Infosys

Engineered enterprise SaaS solutions using React, Node.js, and Next.js, modernizing healthcare and finance platforms with strict compliance. Delivered multi-tenant architectures for 50+ enterprise clients, implementing RBAC with JWT and OAuth2.0. Optimized API integrations with GraphQL and REST, reducing data fetch times by 41% and improving cross-device dashboards. Designed PWAs to boost mobile adoption by 30% and offline usability. Automated deployments with Docker and Kubernetes, achieving zero-downtime updates and improving release frequency. Enhanced real-time data pipelines in Node.js to enable transaction anomaly detection across 2M+ events with sub-5-second response times. Built live chat and notifications with WebSockets and Redis, improving client support response times by 27%. Collaborated with designers to refine UX flows, raising retention by 18% and satisfaction in surveys. Key achievements: launched multi-tenant analytics suite handling 1M+ daily API requests with 99% up

React JavaScript Developer at TransferMate

Developed modern healthcare and finance platforms with React, ES6+ and Node.js, reaching 100K+ daily users. Implemented secure digital prescriptions, online payments, and appointment scheduling, ensuring HIPAA and GDPR compliance. Built modular front-end architecture with reusable hooks and context, improving maintainability and feature delivery by 28%. Optimized PostgreSQL and MongoDB queries, reducing data retrieval times by 35% and lowering server load during peak usage. Enhanced performance with Next.js SSG/SSR, reducing TTFB by 40% and boosting engagement across mobile. Automated regression tests with Jest and Cypress, achieving 80% test coverage and reducing post-release defects by 30%. Delivered secure login and session management with JWT, lowering authentication errors by 22%. Contributed to Agile ceremonies to maintain on-time delivery at 94%.

Senior Full Stack Engineer at Storyblok

Led development of a global financial web platform using React, Next.js and Node.js, optimizing client dashboards with SSR/SSG for fast, SEO-friendly experiences. Built modular, TypeScript-based components with Redux, boosting code reuse and reducing production defects. Architected real-time dashboards with WebSockets and Redis Pub/Sub, supporting 500K+ concurrent updates with sub-200ms latency. Optimized Next.js rendering strategies (ISR and edge) on Vercel, reducing page load times and improving Lighthouse scores. Implemented secure authentication/authorization with NextAuth.js and JWT for seamless SSO across partner apps. Automated deployments with Docker, Kubernetes, and GitHub Actions, shortening release cycles and achieving high uptime. Established monitoring dashboards with Grafana, Sentry, and Datadog, reducing MTTD and improving customer satisfaction. Mentored a team of 6 developers, elevating code quality and onboarding efficiency.

Senior React / Node.js Developer at Infosys

Delivered enterprise SaaS solutions using React, Node.js, and Next.js, modernizing healthcare and finance platforms while ensuring HIPAA/GDPR compliance. Built multi-tenant architectures for 50+ enterprise clients with RBAC using JWT and OAuth2.0, optimized API integrations (GraphQL/REST) reducing data fetch times, and designed PWAs to enhance mobile adoption and offline usability. Automated deployments with Docker/Kubernetes, achieving zero-downtime updates and increased release frequency. Enhanced real-time data pipelines and reporting, enabling rapid anomaly detection with sub-5-second response times. Implemented live chat and notifications via WebSockets/Redis, improving client support response times. Partnered with designers to refine UX/UI, boosting customer retention and satisfaction.

React JavaScript Developer at TransferMate

Developed healthcare and finance platforms using React, JavaScript (ES6+), and Node.js, driving adoption to 100K+ daily users. Built modular frontend architecture with reusable hooks and context, improving maintainability and reducing feature delivery time. Optimized MongoDB and PostgreSQL interactions, enhancing data retrieval speeds and reducing server load. Improved performance with Next.js SSG/SSR, cutting time-to-first-byte and boosting engagement on mobile. Automated regression testing with Jest and Cypress, achieving substantial test coverage and lowering post-release defects. Implemented secure login and session management with JWT, increasing reliability. Contributed to Agile ceremonies, achieving consistent on-time delivery.

Senior .NET Full Stack Engineer at Storyblok

Architected high-performance ASP.NET Core microservices with CQRS and DDD, enabling processing of over 5M daily financial transactions with latency under 200ms and 99% system availability. Led dynamic front-end applications in React and Angular, integrated with back-end APIs, improving customer engagement and reducing defects. Implemented secure RESTful and GraphQL APIs with OAuth2.0/JWT, reducing vulnerabilities. Optimized SQL Server with advanced indexing, partitioning, and Redis caching, boosting reporting performance. Automated CI/CD with Azure DevOps, Docker, and Kubernetes, achieving weekly release cycles and near-continuous production uptime. Implemented monitoring with Application Insights, Grafana, and ELK, shortening MTTD/MTTR. Delivered real-time notifications with SignalR and RabbitMQ supporting 500K daily active users. Mentored a team of 7, increasing velocity and onboarding efficiency.

Senior .NET Developer at Infosys

Engineered enterprise-grade applications using ASP.NET Core, Entity Framework, and Angular, modernizing healthcare and finance workflows while ensuring strict regulatory compliance. Designed multi-tenant SaaS architectures with GraphQL and REST APIs, supporting 50+ enterprise customers with real-time analytics. Integrated Kafka and RabbitMQ messaging into .NET microservices for fraud detection with 2M+ transactions daily and sub-5-second anomaly detection. Optimized SQL Server and PostgreSQL with advanced indexing and partitioning, reducing high-volume query times and improving scalability. Automated deployments with Kubernetes and GitLab CI/CD, achieving zero-downtime releases and quadrupled delivery frequency. Established monitoring with Prometheus and Application Insights, cutting outage recovery times. Led dashboards improvements, boosting customer satisfaction and retention. Trained teams in C# standards, testing, and performance, reducing production defects.

.NET Full Stack Developer at TransferMate

Developed secure healthcare and finance platforms using ASP.NET MVC/Core and Angular, adopted by over 100K daily active users. Implemented features like digital prescriptions, online payments, and appointment scheduling with HIPAA and GDPR compliance. Built scalable databases with MySQL and SQL Server, introducing replication and backups that improved uptime and disaster recovery. Integrated real-time collaboration with SignalR and Redis, improving care coordination. Automated QA with xUnit, Selenium, and Cypress, achieving high test coverage and reduced production bugs. Deployed cloud-ready solutions with Azure and Docker, enabling autoscaling during traffic spikes. Drove digitization of workflows with agile delivery, achieving high on-time release rates.

Senior .NET Full Stack Engineer at Storyblok

Architected and implemented high-performance ASP.NET Core microservices using CQRS and DDD, enabling the processing of over 5M daily financial transactions with latency under 200ms and system availability at 99%. Designed dynamic front-end applications in React and Angular, integrated with back-end APIs to improve customer engagement by 28% and reduce defects by 32%. Engineered secure RESTful and GraphQL APIs with OAuth2.0 and JWT, reducing system vulnerabilities by 90% while ensuring interoperability with multiple fintech partners. Optimized SQL Server with indexing, partitioning, and Redis caching, boosting reporting performance by 42% and cutting query times by 36%. Automated CI/CD pipelines with Azure DevOps, Docker, and Kubernetes, reducing release cycles from monthly to weekly and maintaining 99% production uptime. Implemented system monitoring with Application Insights, Grafana, and ELK, shortening MTTD by 40% and MTTR by 35%. Delivered real-time notifications and dashboards wit

Senior .NET Developer at Infosys

Engineered enterprise-grade applications using ASP.NET Core, Entity Framework, and Angular, modernizing healthcare and finance workflows while ensuring compliance with strict industry standards. Designed multi-tenant SaaS architectures with GraphQL and REST APIs, supporting 50+ enterprise customers with real-time analytics and customizable workflows. Integrated Kafka and RabbitMQ messaging into .NET microservices, enabling fraud detection systems to process 2M+ transactions daily and detect anomalies within 5 seconds. Optimized SQL Server and PostgreSQL databases with advanced indexing and partitioning strategies, reducing high-volume query response times by 38% and improving scalability under load. Automated deployments with Kubernetes and GitLab CI/CD, achieving zero-downtime releases and improving delivery frequency by 4x. Established monitoring with Prometheus and Application Insights, which cut recovery times for outages by 30% and prevented recurring high-severity incidents. Coll

.NET Full Stack Developer at TransferMate

Developed secure healthcare and finance platforms using ASP.NET MVC, .NET Core, and Angular, adopted by over 100K daily active users across multiple regions. Implemented digital prescriptions, online payments, and appointment scheduling, ensuring HIPAA and GDPR data protection compliance. Built scalable databases in MySQL and SQL Server, introducing replication and backup strategies that improved uptime by 25% and disaster recovery times by 40%. Integrated real-time collaboration features with SignalR and Redis, reducing system response delays by 30%. Automated QA with xUnit, Selenium, and Cypress, achieving 85% test coverage and lowering production bugs by 33%. Deployed cloud-ready solutions with Azure and Docker, implementing autoscaling to maintain performance during traffic spikes. Engaged with medical professionals and financial analysts to digitize workflows, reducing operational inefficiencies by 20% and improving end-user satisfaction. Led Agile ceremonies to ensure 95% on-time

Senior Full Stack Engineer at Storyblok

Senior Full Stack Engineer responsible for building a global financial platform using React, Next.js and Node.js with SSR/SSG. Implemented modular TypeScript/Redux components, built real-time dashboards with WebSockets and Redis, and optimized rendering with ISR/edge functions on Vercel. Led secure authentication/SSO using NextAuth.js/JWT, automated Docker/Kubernetes deployments with GitHub Actions, and established monitoring with Grafana/Sentry/Datadog. Mentored a team of 6 and delivered a fintech analytics platform for 2.5M+ users with 99% uptime and a standardized design system to streamline UI across units.

Senior React / Node.js Developer at Infosys

Engineered enterprise SaaS solutions using React, Node.js, and Next.js for healthcare and finance, ensuring strict regulatory compliance. Built multi-tenant architectures for 50+ clients with RBAC (JWT/OAuth2), integrated GraphQL/REST APIs, and delivered PWAs with enhanced offline capabilities. Automated deployments with Docker/Kubernetes enabling zero-downtime updates, and implemented real-time data pipelines processing 2M+ daily events. Enhanced live chat/notifications via WebSockets/Redis, improved UX, and achieved 99% uptime with GDPR/HIPAA readiness.